Oil-burner.



No. 709,94I.- Patented Sept. 30, i902.

S. M. TRAPP.

OIL BURNER.

(Application led Sept. 28, 1901.)

(No Model.)

A W/TNESSES .n /NVENTH 9 m l 50h06/ Tra/0,0.

UNITED STATES PATENT OEEICE.

SAMUEL M. TRAPP, OF SAN DIEGO, CALIFORNIA.

OIL-BURNER.

SPECIFICATION forming part of Letters Patent No. 709,941, datedSeptember 30, 1902.

Application led September 23, 1901. Serial No. 76,269. (No model.)

Diego, in the county of San Diego and State of California, have inventedcertain new and useful Improvements in Oil-Burners,of which thefollowingisaspecification,reference being had therein to theaccompanying drawings.

This invention relates to burners for oil or other liquid fuels, andmore particularly for crude oils. In burners of this class which havecome to my notice the oil is either retorted in a still, where a harddeposit is formed which soon destroys the retort, orsprayed in a liquidform into the fire-pit or furnace by an air-blast or a jet of steamthrough an atomizer. In the latter case the combustion is incomplete,producing a large volume of smoke and a residue of unconsurned carbon orforeign substances within the combustionchamber, besides concentratingthe iiame upon the walls of the same, to their great in- Jury.

The object of the present invention is to overcome these and other badfeatures found in burners heretofore in use by providing an improvedconstruction of burner wherein the oil is thoroughly mingled with andcarbonizes the air before Vbeing delivered from the burner-pipedischarge branches and which discharge branches are so arranged that thehighly-charged currents emitted therefrom are instantly ignited 'anddriven against each other to produce an intense heat at the focal point,removed from any walls,lining,or abutments whatsoever.

The invention consists in the novel arrangement and combination of partshereinafter fully described, and particularly pointed out in the claims.

In the drawings, where'similar letters indicate corresponding parts inboth the views, Figure l is a central vertical section of a burnerinvolving myinvention; and Fig. 2 is an enlarged vertical cross-sectionon line so y, Fig. 1.

The letter a indicates the main portion of the burner pipe, terminatingin discharge branches b,which are oppositely arranged, so as to bedirected toward each other by forming return-bends c in the pipe. Theburnerpipe and discharge branches are formed of graphite or likematerial and preferably made integral-that is, of a single piece.Positioned within each of the said discharge branches is a series ofshelves d, which incline slightly from the back toward the oritice.These shelves, disposed one above the other, are of different lengthsand preferablyY ot' different Widths, the top one being the shorter andnarrower and each successive lower one extending beyond that of the nextabove, thus forming w steps, so to speak, upon which the oil isintercepted by each step after spreading upon and overiowing each shelfin succession from top to bottom. The shelves are preferably made ofplate or sheet iron and are detachably secured together within thedischarge branches, so as to be removed when desirable.

The oil is received by pipes s from a source of supply and falls uponthe top shelf, which is lipped or flanged upon its sides and rear end toprevent the liquid spilling thereover. Air or steam are supplied, eitherseparately or together, by air and steam pipes e and f, respectively,leading from the atmosphere or from a steam-generator. The said air andsteam supply pipes extend within the main portion a of the burner andare preferably bifurcated therein to provide means for conducting theirrespective contents directly toward the discharge branches thereof. Theair or steam after passing around the several shelves d aforesaid andbeing carbureted -with oil emanating therefrom issue in two Aopposingcurrents to be consumed at the focal point between the dischargebranches. Although this burner is primarily intended to operate under anatural draft, when the pipe f would be used solely for introducingsteam to make the air supplied to the burner discharge branches hu mid,a forced draft may be utilized by the admission of steam under pressurethrough the aforesaid pipe or by attaching a blower to the air-supplypipe. The air passing through the burner-pipe is heated to a high degreeby the heat absorbed through the walls of the pipe radiated thereuponfrom the re. With eXtra heavy oils the shelves may advantageously beturned end for end, so that instead of the step ends being adjacent tothe orifices of the discharge branches, as shown, they will be flush oreven with the oriiices,thus

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carbonizing the fuel almost to the point of combustion. When the shelvesare arranged in this way, then the oil-pipes s would be attached to thedischarge branches at holes 7c, provided to deliver the fuel upon thetop shelves in their changed locations.

Perfect combustion is effected by my improved burner, while it is cheapand simple in construction and easily applicable to any furnace. Forproducing intense heat it is the most efective device yet discovered, asit insures a perfect mingling of the oil and oxygen, andthe whole beingdelivered t0 the furnace is immediately ignited and consumed upon itsissuance in a clear flame.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In an oil-burner, the combination with a burner-pipe circular incross-section and having two oppositely-arranged discharge branches,oil-supply pipes communicating with the discharge branches, and air andsteam supply pipes communicating with the burner-pipe, of a series ofshelves arranged in each discharge branch, beneath the oilsupply pipes,said shelves disposed at a slight incline toward the discharge end ofthe discharge branches, and the uppermost shelf having side flanges anda flange at its rear end, the said shelves being stepped at one endwhereby the oil spreads over the surface of each shelf before beingdischarged therefrom, as and for the purpose described.

2. In a device of the character described, the combination of a burnerhaving integral oppositely-arranged discharge branches circular incross-section, means for feeding air or steam to said burner, oil-supplypipes communicating with the discharge-orifices, and shelves arrangedwithin the discharge branches under the discharge of the supplypipes,the ends of the shelves adjacent the discharge of the branches beingstepped, with side and rear end anges on the uppermost shelf, as and forthe purpose described.

In testimony whereof I aix my signature in presence of two witnesses.

SAMUEL M. TRAPP.

Witnesses:

L. B. HOWARD, M. E. COLLINS.

